Hello Time Nuts -
I have an older HP model 5065A Rubidium standard (s/n 1320A) and one of the heaters in the A-12 module, Rubidium Vapor Frequency Reference (aka "thermos bottle"), has failed. It appears that this is the only failed part in the entire unit, and is one part that simply cannot be repaired or replaced. Does anybody have one of these modules with other failed parts, like a bad bulb or photocell, and good heaters they would be willing to sell? You can easily check the heaters by measuring resistances on P-15, the DB-9 connector going in to the A-12 module. The resistance between pins 3-4 and pins 4-5 should be around 50 ohms. Resistance from pin 4 to the threaded stud on the end of the module should show an open circuit. Here's hoping someone can help me out with this. Many thanks! Rick W2GPS Richard M. Hambly 363 Hawick Court, Severna Park, MD 21146 410-987-7835 phone, 410-987-7836 Fax, 410-299-2147 cell <mailto:r...@cnssys.com> r...@cnssys.com, <http://www.cnssys.com> www.cnssys.com, <http://www.gpstime.com> www.gpstime.com _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
